Mastering the Periodic Table for the 8th Grade Science STAAR

This video tutorial covers key concepts in eighth-grade science, including atomic structure, valence electrons, and the periodic table. It explains subatomic particles, chemical reactions, and the glucose compound. The tutorial also discusses formula triangles for density, speed, and force, lunar phases, and tides. Additionally, it covers the Earth's seasons, plate tectonics, and life sciences terms like biotic and abiotic factors, prokaryotic and eukaryotic cells, and types of reproduction. The video aims to equip students with strategies to excel in their science tests.

What does the atomic number of an element represent?

• Number of neutrons

• Number of protons and electrons

• Atomic mass

• Number of valence electrons

How can you determine the number of neutrons in an atom?

• Atomic mass minus atomic number

• Atomic number minus atomic mass

• Valence electrons minus atomic number

• Protons plus electrons

What do elements in the same group of the periodic table have in common?

• Same number of neutrons

• Same number of valence electrons

• Same atomic mass

• Same number of energy levels

What is the formula for glucose?

• C6H12O6

• C2H4O2

• C12H22O11

• C6H6O

Tags

NGSS.MS-PS1-1

Which evidence indicates a chemical reaction has occurred?

• Dissolving of a substance

• Change in state

• Change in volume

• Unexpected color change

Tags

NGSS.MS-PS1-2

What causes spring tides?

• The sun, earth, and moon being in a straight line

• The moon's phases

• The earth's rotation

• Neap tides

Tags

NGSS.MS-ESS1-1

How long is the cycle from one new moon to the next?

• About 28 days

• Exactly 30 days

• About 14 days

• Exactly 31 days

Tags

NGSS.MS-ESS1-1

What is the main difference between prokaryotic and eukaryotic cells?

• Eukaryotic cells are smaller

• Prokaryotic cells have a nucleus

• Eukaryotic cells have a nucleus

• Prokaryotic cells can perform photosynthesis

Tags

NGSS.MS-LS4-2

What type of plate boundary creates mountains?

• Divergent

• Subduction

• Convergent

• Transform

Tags

NGSS.MS-ESS2-3

What do autotrophs and heterotrophs differ in?

• Their lifespan

• Their method of obtaining food

• Their cell type

• Their ability to move

Tags

NGSS.MS-LS2-3